The heros should come with a tech tree of upgradable/customizable powers like Lord of the rings battle for middle earth 2.Otherwise i loved the beta
Having another tech tree to manage is unnecessary and will make control more cumbersome.
Well it dont have to be a tech tree exactly just addition powers and it work well for LOTR BFME 2 for pc. Heros helped turn the tides when you thought all was lost.